Championing Science shows scientists how to persuasively communicate complex scientific ideas to decision makers in government, policy, and education. This comprehensive guide provides real-world tactics for scientists to help build the vital communication, influence, and emotional intelligence skills needed to motivate those with little to no science background to understand and support their science. Instruction, interviews, and examples demonstrate that inspiring decision makers to act requires extracting the essence of scientific findings, crafting clear messages, simplifying visuals, bridging paradigm gaps, and telling stories. These principles come to life through the accounts of science champions such as Robert Millikan, Vannevar Bush, scientists at Caltech and MIT, and others. With Championing Science, scientists will learn how to use their communication skills effectively to garner funding, secure future research, and, ultimately, impact policy.